Funding for this research was provided by:
Uniwersytet Medyczny im. Piastów Slaskich we Wroclawiu (SUB.C220.21.028)
Received: 25 December 2020
Accepted: 3 April 2021
First Online: 15 April 2021
: The Ethics Committee of Wroclaw Medical University in Poland, approval number KB-357/2010.
: The authors received consent forms from all volunteers who took part in the study, and have them on file in case they are requested by the editor.
: The authors declare that they have no competing interests.